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The first thing to do in correcting the problem here since all devices are working on your network is to do a power cycle on everything that you have on your network including the modem, router and computer and printers.To do that power off your modem, router , computers and printers for about 1 minute then after that power ON first the modem then router then computer and the printer and after that check if you can now use the printers again.

first intall the driver software of lexmark printer on the laptop.....then you can use lexmark printer on the laptop....if you dont have the driver just tell the model no of the printer...i can search it for you......try this....it will work 100%...........